NOTE: This procedure can be applied to all accessory gearbox
____ pads receiving hydraulic equipment.
 (3)  For this procedure, the accessory gearox will be refered to as the AGB.
 B. Equipment
 (1)  Sealing tool - B56A2675, CFM International, P.O. Box 15514, Cincinnati, OH 45215
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 72-63-00
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C. Consumable Materials
 (1)  
Filtered air or nitrogen source - 10-12 psig (0.7-0.8 kpa), 40 microns absolute filtration, oil less than 40 mg for each kilogram of air, water content at -40 deg F (-40 deg C) dew point at atmospheric pressure, ambient temperature

 (2)  
D00601, Grease (CP2101) graphite - GP40, Aeroshell 8

 (3)  
D00599, Oil (CP2442) Engine - CFMI SB 79-001

 D. References
 (1)  
AMM 71-11-02/201, Fan Cowl Panels

 (2)  
AMM 72-60-00/201, Accessory Drives

 E. Access
 (1)  
Location Zones
 502/602 Left Fan Cowl Panels
 503/603 Right Fan Cowl Panels
 506 Engine No. 1 - Turbine Frame
 606 Engine No. 2 - Turbine Frame

 (2)  
Access Panels
 5737L Engine No. 1 - Right Fan Cowl Panel
 5746L Engine No. 1 - Left Fan Cowl Panel
 5837R Engine No. 2 - Right Fan Cowl Panel
 5846R Engine No. 2 - Left Fan Cowl Panel

 F. Examine the AGB for leakage (Fig. 501).
 S 015-043-C00
 (1)  
Open the left and right fan cowl panels (AMM 71-11-02/201).

 S 025-044-C00

 (2)  
Disconnect the starter or fuel pump, and hydraulic and CSD pad drain.

 S 945-045-C00

 (3)  
Remove the storage plugs from tool 856A2675-P04/07.

 S 425-046-C00

 (4)  
Take sealing tool 856A2675 and connect the flexible hose 856A2675-P04 to the AGB drain nipple. Tighten the connector to 200-250 pound-inches (22.6-28.2 Newton meters).

 S 425-047-C00

 (5)  
Connect flexible hose 856A2675-P07 to the air or nitrogen supply and tighten to 200-250 pound-inches (22.6-28.2 Newton meters).

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 205-057-C00

 CAUTION: DO NOT OVER-PRESSURIZE THE CAVITY. THE MAXIMUM PERMITTED_______
 PRESSURE IS 29 PSI (200 kpa). OVER-PRESSURIZING THE
 SYSTEM CAN DAMAGE THE MAG SEAL.
 (6)  Open the air or nitrogen supply source and pressurize the cavity to
 14.5 PSI (1 kpa).
 S 425-049-C00
 (7)  Close the isolation valve to isolate the AGB cavity.
 S 785-050-C00
 (8)  Do a check of the sealing cavity to make sure there is no decrease
 in air pressure for one minute.
 S 795-051-C00
 (9)  If you cannot isolate and pressurize the cavity, or if you find a
 quick pressure decrease, this indicates one or more of the these
 conditions:
 NOTE: The problems listed directly below all involve the____
 starter or other equipment attached to the AGB. You will
 need to remove these items to troubleshoot, isolate, and
 correct the defect.
 (a) The AGB has a damaged O-ring.
 (b) There is a missing O-ring on the starter output shaft.
 (c) There is a problem with a carbon seal.
 S 785-052-C00

 (10)
 After you corrected the problem, perform the pressurized leak check again to make sure the AGB cavity has a satisfactory seal.

 S 415-053-C00

 (11)
 After you complete the pressurized test of the AGB, remove the sealing tool and re-install the oil tube on the starter or other drain pad. Torque the connector to 200-250 pound-inches (22.6-28.2 Newton meters).
　
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